The Griffin Binder Insert Case for iPad is a brilliant idea. I'm actually shocked I haven't seen more of these! It seems like the prefect accessory for those headed back to school.
The basic idea for the Griffin Binder Insert Case is this -- take an iPad case, press three standard spaced holes along one side, and make it perfectly fit a school or work binder. I love it. There's even a built-in pen holder which you can use for a regular pen to take your paper notes, a stylus to take your iPad notes, or even better, a hybrid stylus pen that lets you do both all in one.